Judge a book by its cover

I often wonder if the Twilight books would have been as popular if the covers were boring. 

You can try to not judge a book by its cover, but let's face it.  With so many books out there fighting for our attentions, a captivating book cover goes a long way.  Here are a few covers that have recently caught my eye. 

Have you ever read a book based on the cover alone?  What are your favorite book covers?